code: def __call__(self, *args):
      return None
  
file_path: mmocr/tests/test_models/test_textdet/test_heads/test_base_head.py
imports: from unittest import TestCase, mock
  from mmocr.models.textdet import BaseTextDetHead
  from mmocr.registry import MODELS
label_desc: Use image node_id 3 for calling the FakeModule obj's underlying member method code with example usage: obj.__call__() and returns: None